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STM32 Ultra Low Power MCUs

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ST’s ultra-low-power MCU platform is based on a proprietary ultra-low-leakage technology and optimized design.

Designers of energy efficient embedded systems and applications have with STM32 ultra-low-power microcontrollers a rich choice of balance between performance, power, security and cost effectiveness: from the STM8L (8-bit proprietary core) up to the STM32L4 (32-bit Arm® Cortex®-M4) including the STM32L0 (Arm® Cortex®-M0+) and the STM32L1 (Arm® Cortex®-M3). The STM32L5 (Arm® Cortex®-M33) with its enhanced security features is the latest addition to this rich portfolio.

With the industry’s lowest current variation between 25 and 125 °C, STM8L/STM32L solutions guarantee outstandingly low current consumption at elevated temperatures. The MCUs reach the industry's lowest power consumption of 170 nA in lowest power mode with SRAM retention. Wake-up times have also been taken into consideration and are as low as 3.5 μs from Stop mode.

The STM32L5 series enhanced security features leverage Arm® Cortex®-M33 and its TrustZone® for Armv8-M. Thanks to this new core and a new ST ART Accelerator™ (supporting now also external memory), the STM32L5 reaches 427 CoreMark.

The STM32L4 series offers the excellence of ST’s ultra-low-power platform with an additional performance dimension by providing
100 DMIPS with DSP instructions and floating-point unit (FPU), more memory (up to 1 Mbyte of Flash memory) and innovative features.

The STM32L4+ series extends STM32L4 technology by offering higher performance (120 MHz/409 CoreMark executing from internal Flash memory), larger embedded memories (up to 2 Mbytes of Flash memory and 640 Kbytes of SRAM), and more advanced graphic features with no compromise on its ultra-low power consumption capability.

The STM32L0 series offers a genuine energy-saving solution for entry-level applications. Available in tiny packages down to 14-pin and with a wide range of Flash memory densities from 8 to 192 Kbytes, the STM32L0 combines ultra-low power consumption with a competitive portfolio.

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Artificial Neural Network mapping made simple with the STM32Cube.AI
Artificial Neural Network mapping made simple with the STM32Cube.AI

The STM32Cube.AI is an extension pack of the widely used STM32CubeMX configuration and code generation tool enabling AI on STM32 Arm® Cortex®-M-based microcontrollers.

STM32L5 MCU Series: Excellence in Ultra-Low-Power with More Security
STM32L5 MCU Series: Excellence in Ultra-Low-Power with More Security

Security has emerged as one of the 3 key areas that developers of embedded and IoT applications are thriving to improve. The STM32L5 microcontroller series is the solution and provide a new optimal balance between performance, power and security. The STM32L5 MCU series harnesses the security features of the Arm Cortex-M33 processor and its TrustZone for Armv8-M combined with ST security implementation. ST-proprietary ultra-low-power technologies create a class-leading MCU for energy-conscious applications such as Internet of things (IoT), medical, industrial and consumer. Offering up to 512 Kbytes of flash (dual bank) memory and 256 Kbytes of SRAM, the STM32L5 series of microcontrollers reaches an upgraded level of performance (427 CoreMark) thanks to this new core and a new ST ART Accelerator™ (supporting now also external memory). The STM32L5 offers a large portfolio with 7 packages (from 48 to 144 pins) and supports up to 125°C ambient temperature.

STM32 step by step tutorials to get you building an IoT application fast!
STM32 step by step tutorials to get you building an IoT application fast!

STM32 step-by-step is a learning program, and is part of the STM32 Education initiative, designed for anyone interested in getting started on building projects with the STM32 microcontroller and its powerful ecosystem of development boards and software programming tools. Whether you are an experienced embedded programmer or an enthusiastic beginner, learn in 5 tutorials from the basics of the STM32 ecosystem installation to blinking your LEDs to advanced software development with sensors, UART messages and Bluetooth communication. Start now and quickly become a professional STM32 developer!

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Discover our latest STM32 ultra-low-power MCUs

STM32L4+ online training

STM32L4 Online Training

Discover our latest STM32 ultra-low-power MCUs

  • The new STM32L0x0 Value line incorporates the efficient 32-bit Arm® Cortex®-M0+ core operating at 32 MHz, embedded memories (128 Kbytes of Flash program memory, 512 bytes of data EEPROM and 20 Kbytes of RAM). This STM32L0x0 Value line provides high power efficiency over a wide performance range. This is achieved with a large choice of internal and external clock sources, internal voltage adaptation, and several lowpower modes.
  • The new STM32L412 (no crypto) and STM32L422 (with crypto) devices extend the STM32L4 series with Flash density from 128 to 64 Kbytes. Ideal for cost-sensitive applications, low-pin-count-packages choices range from 32-pin LQFP (5x5mm) to 64-pin BGA (5x5mm) including 36-pin WLCSP (2.58x3.07 mm). Developers will appreciate the slim-form-factor NUCLEO-L412KB board and NUCLEO-L412RB-P including a step down converter.